阅读说明：本技术 可变容量型压缩机 (Variable displacement compressor ) 是由 李建祜 李泰镇 裴仁杓 于 2019-06-03 设计创作，主要内容包括：本发明提供一种可变容量型压缩机,其具备固定设置在驱动轴的凸耳板及与上述凸耳板结合而进行旋转运动时倾斜角可变的斜盘,上述凸耳板包括在凸耳板的一侧面以保持相应距离的方式间隔设置且朝向斜盘突出形成的一对凸耳臂,上述斜盘包括在斜盘的另一侧面朝向上述凸耳板突出形成的单个斜盘臂,其中,上述单个斜盘臂形成圆弧状,上述斜盘臂以使上述斜盘臂的左、右侧面靠近一对凸耳臂的各个的内侧的方式配置在以相应距离彼此间隔设置的一对凸耳臂之间而形成契合部。当斜盘形成最大倾斜角时,通过一对凸耳臂和斜盘臂的密接而形成的契合部形成圆筒状,使得在契合部产生的流动阻力最小化,且增加压缩机的效率。(The present invention provides a variable displacement compressor, which comprises a lug plate fixedly arranged on a driving shaft and a swash plate with a variable inclination angle when the variable displacement compressor is combined with the lug plate to perform rotary motion, wherein the lug plate comprises a pair of lug arms which are arranged at intervals on one side surface of the lug plate in a manner of keeping a corresponding distance and protrude towards the swash plate, the swash plate comprises a single swash plate arm which is formed at the other side surface of the swash plate in a protruding way towards the lug plate, the single swash plate arm is in an arc shape, and the swash plate arm is arranged between the pair of lug arms arranged at intervals in the corresponding distance in a manner of enabling the left side surface and the right side surface of the swash plate arm to be close to the inner side of each of the pair of lug arms to form a matching part. When the swash plate forms the maximum inclination angle, the fitting portion formed by the close contact of the pair of lug arms and the swash plate arm is formed in a cylindrical shape, so that the flow resistance generated at the fitting portion is minimized, and the efficiency of the compressor is increased.)

1. A variable displacement compressor comprising a lug plate fixedly provided on a drive shaft and a swash plate whose inclination angle is variable when the swash plate is coupled to the lug plate and performs a rotational motion,

The lug plate comprises a pair of lug arms which are arranged at intervals on one side surface of the lug plate in a corresponding distance keeping mode and are formed by protruding towards the swash plate;

The swash plate includes a single swash plate arm formed to protrude toward the lug plate at the other side of the swash plate,

wherein the single swash arm is formed in an arc shape, and the swash arm is disposed between a pair of lug arms spaced apart from each other by a predetermined distance so that left and right side surfaces of the swash arm are close to inner sides of the respective lug arms.

2. A variable capacity type compressor according to claim 1,

The outer side of each of the pair of lug arms is extended in a downward arc shape.

3. A variable capacity type compressor according to claim 2,

when the inclination angle of the swash plate becomes the maximum inclination angle,

The engaging portion formed by the combination of the pair of lug arms and the single swash arm is formed in a curved surface shape.

4. A variable capacity type compressor according to claim 1,

An inclined surface inclined toward the swash plate is formed inside the lug arm of the lug plate,

A sliding portion that slides in correspondence with the inclined surface is formed on a swash plate arm side of the swash plate.

5. a variable capacity type compressor according to claim 4,

The inclined surface and the sliding portion are each formed as a pair spaced apart from each other so as to maintain a predetermined distance.

6. A variable capacity type compressor according to claim 4,

An oil guide groove is formed in each of inner side edges of a pair of lug arms which are in close contact with an outer periphery of the swash plate arm, wherein the oil guide groove guides oil so that the oil can flow into the inclined surface and the sliding portion when the inclination angle of the swash plate reaches a maximum inclination angle.

Technical Field

The present invention relates to a variable displacement compressor in which a pair of lug arms and a swash plate arm are formed in an arc shape, a single swash plate arm is disposed between the pair of lug arms to form an engagement portion, and the engagement portion formed by the pair of lug arms and the swash plate arm is formed in a cylindrical shape when a swash plate forms a maximum inclination angle, thereby minimizing a flow resistance of a refrigerant in the engagement portion.

Background

Generally, an air conditioning apparatus used in an automobile is a device that maintains the temperature inside the automobile lower than the outside temperature by using a refrigerant, and includes a compressor, a condenser, an evaporator, and the like to form a circulation loop of the refrigerant.

The compressor is driven by the power of an engine or a motor as a device for compressing and pumping a refrigerant.

the swash plate type compressor may be classified into a capacity variable swash plate type compressor in which a disc-shaped swash plate is variable in inclination angle corresponding to rotation of a driving shaft receiving power of an engine or a fixed type swash plate type compressor which is provided in a fixed state.

the variable displacement swash plate type compressor has advantages in that the inclination angle of the swash plate is continuously changed according to a change in thermal load, the flow rate is precisely controlled by controlling the amount of movement of the piston, and the riding comfort of the vehicle can be improved by preventing a rapid change in torque of the engine according to the compressor.

As can be seen from the connection structure of the lug plate and the swash plate of the conventional variable capacity swash plate type compressor, the lug plate is formed with a projection projecting toward the swash plate, and the swash plate is formed with an arm having a moving roller that rolls in contact with the projection.

The lug plate and the swash plate are connected by the mutual contact between the projection and the arm.

Korean granted patent No. 10-1193399 discloses the background art related to the present invention.

On the other hand, the conventional technology has problems in that the efficiency of the compressor is reduced by the flow resistance of the refrigerant generated inside the swash plate chamber by the connection mechanism formed between the swash plate and the lug plate, and the connection mechanism is engaged by the support arms or formed by a coupling structure using pins or the like, and the engagement or coupling portion formed in this way has a complicated external shape and has too many protrusions or the like, so that the flow resistance of the refrigerant is high.

Disclosure of Invention

Technical problem to be solved by the invention

An object of the present invention is to provide a variable displacement compressor in which a single swash plate arm having an arc shape is provided with left and right side surfaces spaced apart from each other with a distance therebetween, and the swash plate arm is disposed between a pair of lug arms extending downward in an arc shape such that the left and right side surfaces are in close contact with the inner sides of the respective lug arms to form engaging portions, whereby the engaging portions formed by the close contact of the lug arms and the swash plate arm are formed in a cylindrical shape when the swash plate is at a maximum inclination angle, thereby minimizing flow resistance generated at the engaging portions and increasing the efficiency of the compressor.

Technical scheme

The variable displacement compressor according to the present invention includes a lug plate fixedly provided on a drive shaft and a swash plate whose inclination angle is variable when the variable displacement compressor is coupled to the lug plate to perform a rotational motion, wherein the lug plate includes a pair of lug arms provided at a distance from one side surface of the lug plate and protruding toward the swash plate, and the swash plate includes a single swash plate arm protruding toward the lug plate at the other side surface of the swash plate, wherein the single swash plate arm is formed in an arc shape, and the swash plate arm is disposed between the pair of lug arms provided at a distance from each other so that the right and left side surfaces of the swash plate arm are close to the inner sides of the pair of lug arms to form an engagement portion.

In this case, it is preferable that each of the outer sides of the pair of lug arms is formed to extend in an arc shape downward.

Wherein the first and second light sources are, preferably,According to the present invention, when the inclination angle of the swash plate is changed to the maximum inclination angle, the engaging portion formed by the engagement of the pair of lug arms and the single swash plate arm forms a curved surfaceAnd (4) shape.

In addition, an inclined surface inclined toward a swash plate is formed inside the lug arm of the lug plate according to the present invention, and a sliding portion sliding in accordance with the inclined surface is formed on the swash plate arm side of the swash plate

In this case, it is preferable that the inclined surface and the sliding portion are formed as a pair spaced apart from each other to maintain a predetermined distance.

And, at the outer periphery of the swash plate arm according to the present inventionInner edges of each of a pair of closely-connected lug armsAn oil guide groove is formed, wherein the oil guide groove guides oil so that the oil can flow into the inclined surface and the sliding portion when the inclination angle of the swash plate can be changed to the maximum inclination angle.

Advantageous effects

The variable capacity compressor according to an embodiment of the present invention has the following effects.

First, a pair of lug arms and a swash plate arm are formed in an arc shape, and a single swash plate arm is disposed between the pair of lug arms to form an engagement portion, and when the swash plate forms a maximum inclination angle, the pair of lug arms and the single swash plate arm which are in close contact to form the engagement portion are formed in a cylindrical shape, thereby minimizing flow resistance generated at the engagement portion and increasing efficiency of the compressor.

Second, the pair of lug arms and the single swash arm, which are extended from the swash plate and the lug plate, respectively, can form cylindrical engaging portions, thereby improving durability as compared with the enjoyed technology.

Drawings

Fig. 1 is a diagram illustrating an example of a coupling state of a drive shaft, a lug plate, and a swash plate of a variable displacement compressor according to an embodiment of the present invention from a side surface.

fig. 2 is an exemplary view showing a coupling state of a driving shaft, a lug plate and a swash plate of the variable displacement compressor according to the embodiment of the present invention from above.

Fig. 3 is an exemplary view showing a lug plate (lug plate) and a pair of lug arms (lug arm) according to an embodiment of the present invention.

FIG. 4 is an exemplary diagram illustrating a swash plate and a single swash arm of an embodiment of the present invention.

Fig. 5 is a view illustrating data analyzed according to a change in surface pressure of a refrigerant when a lug plate and a swash plate of a conventional compressor are rotated.

Fig. 6 is a view illustrating data analyzed according to a change in surface pressure of a refrigerant when a swash plate and a lug plate of a variable displacement compressor according to an embodiment of the present invention rotate.

Description of the reference numerals

100: drive shaft

200: lug plate

210: a pair of lug arms

211: side surface of lug arm

220: inclined plane

300: swash plate

310: swash plate arm

320: sliding part

400: fitting part

Detailed Description

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Before this, the terms or words used in the present specification and claims should not be construed as limited to general or dictionary meanings, but interpreted as meanings and concepts conforming to the technical idea of the present invention in accordance with the principle that the inventor can appropriately define the concept of the term to describe the present invention in the best way.

Therefore, the embodiments described in the present specification and the configurations shown in the drawings are only the most preferable embodiments of the present invention and do not represent all the technical ideas of the present invention, and therefore, it should be understood that the present application may have equivalent modifications that can replace them.

The present invention relates to a variable displacement compressor having the following structure: the pair of lug arms and the single swash plate arm are formed in an arc shape, and the swash plate arm is disposed between the pair of lug arms to form an engagement portion, and when the swash plate forms a maximum inclination angle, the engagement portion formed by the pair of lug arms and the swash plate arm is formed in a cylindrical shape, thereby minimizing flow resistance of a refrigerant at the engagement portion.

First, like a conventional swash plate compressor, a variable displacement compressor according to an embodiment of the present invention includes a cylinder block having a plurality of cylinder bores (cylinder bores) formed in parallel on an inner circumferential surface along a longitudinal direction, a front housing hermetically coupled to a front side of the cylinder block, and a rear housing hermetically coupled to a rear side of the cylinder block with a valve plate interposed therebetween.

A Cylinder block (Cylinder block) and a Crankcase (crank case) are formed inside the front housing, and preferably, one end of the driving shaft 100 is rotatably supported by the front housing through a bearing, and the other end of the driving shaft 100 is supported by a bearing provided in the Cylinder block through the Crankcase.

The above-described support structure of the drive shaft 100 is not limited to the structure described above, and a structure in which the drive shaft 100 is supported on the front and rear housings, the cylinder block and the rear housing, or separately supported on the cylinder block may be employed.

A lug plate 200 and a swash plate 300 are provided around the drive shaft 100 disposed in the crankcase.

The variable displacement compressor according to an embodiment of the present invention, which is illustrated in fig. 1 to 4, includes a driving shaft 100, a lug plate 200 fixedly coupled to the driving shaft 100, and a swash plate 300 coupled to the lug plate 200 to perform a rotational motion and having a variable inclination angle.

in this case, the driving shaft 100 has a linear rod shape, a sleeve (sleeve) is slidably coupled to the driving shaft 100, and the swash plate 300 is rotatably movable through the sleeve.

Preferably, the sleeve has a ring shape, the driving shaft 100 is inserted into the sleeve, the swash plate 300 is coupled to an outer circumferential surface of the sleeve, and the swash plate 300 is formed with an insertion hole 301, wherein the insertion hole 301 is a space for installing the sleeve into which the driving shaft 100 is inserted.

A first compression spring is disposed between the lug plate 200 fixedly coupled to the drive shaft 100 and the sleeve, and normally exerts a force in a direction of pushing open the swash plate 300 at a minimum inclination angle.

A second compression spring is disposed behind the swash plate 300, and the second compression spring is disposed by a snap ring fixedly installed at the driving shaft 100 and elastically supports the swash plate 300.

The lug plate 200 facing the swash plate 300 is fixedly coupled to the drive shaft 100, and when the drive shaft 100 rotates, the lug plate 200 rotates together with the drive shaft, thereby transmitting the power of the drive shaft 100, which rotates the swash plate 300, to the swash plate 300.

At this time, a pair of lug arms 210 including a first lug arm 210 and a second lug arm 210 spaced apart from each other are formed on one side surface of the lug plate 200 to protrude toward the swash plate 300, and the outer side of each lug arm 210 according to an embodiment of the present invention is extended in an arc shape downward along the outer periphery of the lug plate 200, thereby forming a lug arm side surface 211.

Further, a single swash arm 310 is formed to protrude toward the lug plate 200 at the other side surface of the swash plate 300 facing the lug plate 200, the single swash arm 310 is formed in an arc shape, and the swash arm 310 is disposed between the pair of lug arms 210 spaced apart by a certain distance so that the left and right side surfaces of the swash arm 310 are in close contact with the inner sides of the pair of lug arms 210 to form a fitting portion 400.

At this time, the left side surface of the swash arm 310 is in close contact with the inner surface of the first lug arm 210, and the right side surface of the swash arm 310 is in close contact with the inner surface of the second lug arm 210.

Therefore, when the inclination angle of the swash plate 300 is the maximum inclination angle, the engaging portion 400 formed by the coupling of the pair of lug arms 210 and the single swash plate arm 310 is formed in a curved shape like a cylinder, thereby achieving an effect of reducing the refrigerant flow resistance.

Further, an inclined surface 220 inclined toward the swash plate 300 is formed inside the lug arm 210 of the lug plate 200, a sliding portion 320 slidable in correspondence to the inclined surface 220 is formed on the bottom surface of the swash plate arm 310 of the swash plate 300, and the inclination angle of the swash plate 300 is changed when the sliding portion 320 of the swash plate slides along the inclined surface 220 of the lug plate 200.

In this case, the inclined surface 220 and the sliding portion 320 are formed as a pair spaced apart from each other to maintain a predetermined distance, and the inclined surface 220 is in contact with the swash plate arm 310 to function as a variable path of the swash plate 300 and support the force of the swash plate 300 based on the compression force transmitted from the piston.

Further, an oil guide groove 410 is formed at an inner side edge of each of the pair of lug arms 210 closely contacting with the outer periphery of the swash plate arm 310, and the oil guide groove 410 guides oil so that the oil can flow into the inclined surface 220 and the sliding portion 320 when the inclination angle of the swash plate 300 becomes the maximum inclination angle.

Therefore, according to the above-described configuration of an embodiment of the present invention, when the swash plate 300 has the maximum inclination angle, the pair of lug arms 210 and the single swash plate arm 310, which are closely contacted to each other so as to form the engaging portion 400, are formed in a cylindrical shape, so that the flow resistance generated in the engaging portion 400 is minimized, thereby increasing the efficiency of the compressor and improving the durability as compared to the conventional configuration.

Fig. 5 is an image showing data according to a change in surface pressure of a refrigerant when the lug plate and the swash plate of the conventional compressor are rotated, and it can be confirmed from fig. 5 that the conventional compressor in which the swash plate arms are formed as a pair generates uneven pressure along the outer surfaces of the lug plate and the swash plate.

For this reason, the conventional compressor has a problem that the overall compression efficiency is lowered due to high flow resistance of the lug plate and the swash plate, and also has a problem that noise is generated and durability is lowered due to an eccentric action caused by pressure imbalance.

however, fig. 6 is an image showing data according to a change in the surface pressure of the refrigerant when the lug plate and the swash plate of the variable displacement compressor according to the embodiment of the present invention are rotated, and it can be confirmed from fig. 6 that a relatively uniform surface pressure is generated compared to the conventional structure.

Therefore, the capacity variable type compressor of the present invention can improve compression efficiency and remarkably reduce noise by reducing resistance generated when rotation occurs, because pressure generated at the outer surfaces of the lug plate and the swash plate when driving is more uniform and flow resistance is lower than that of the prior art.

The present invention has been described above with reference to the embodiments shown in the drawings, but it is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments derived therefrom may be implemented. Therefore, the actual technical scope of the present invention should be determined by the technical idea of the appended claims.